watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.9.3109:18042] Modules linked in: irq event stamp: 13709333 hardirqs last enabled at (13709332): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (13709333): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (131886): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (131886): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (131886): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (131889): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (131889): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (131889): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 18042 Comm: syz.9.3109 Not tainted 6.16.0-syzkaller-g1b30d4441727 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:perf_trace_buf_alloc+0xa9/0x2a0 kernel/trace/trace_event_perf.c:-1 Code: a9 00 00 00 41 89 ef 4d 85 f6 0f 84 aa 00 00 00 bf 05 00 00 00 89 ee e8 05 82 f6 ff 83 fd 04 0f 87 c2 01 00 00 e8 b7 7d f6 ff <4c> 89 3c 24 4d 69 ff a8 00 00 00 e8 97 57 ae 09 41 89 c5 41 89 c4 RSP: 0018:ffffc90000a07b80 EFLAGS: 00000246 RAX: ffffffff81c92139 RBX: 000000000000002c RCX: ffff88805f1c8000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 0000000000000001 R08: ffffc90000a08980 R09: 0000000000000000 R10: ffffc90000a07e58 R11: fffff52000140fcd R12: 1ffff92000140f80 R13: dffffc0000000000 R14: ffffc90000a07c20 R15: 0000000000000001 FS: 00007fc612ff46c0(0000) GS:ffff888125d2a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c24a098 CR3: 0000000051e48000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4365 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2351 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3234 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3325 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5225 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 6f e1 e8 09 e8 1a 28 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc900046cf678 EFLAGS: 00000286 RAX: 11d3041147479500 RBX: 0000000000000000 RCX: 11d3041147479500 RDX: 0000000000000006 RSI: ffffffff8d9b15f8 RDI: ffffffff8be2fd00 RBP: ffffc900046cf6d0 R08: ffffffff8fa32437 R09: 1ffffffff1f46486 R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffff88805f1c8000 R13: dffffc0000000000 R14: ffff88801ceada00 R15: ffff8880b873ab58 context_switch kernel/sched/core.c:5360 [inline] __schedule+0x17a0/0x4cc0 kernel/sched/core.c:6961 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_init+0x96/0x2d0 kernel/trace/trace_event_perf.c:223 Code: 59 00 48 8b 1d fb c7 50 0c 48 81 fb a0 d1 19 8e 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 17 01 00 00 4d 63 24 24 4c 89 ff 4c 89 e6 e8 73 97 f6 RSP: 0018:ffffc900046cfa78 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffffffff8f595be0 RCX: 0000000000080000 RDX: ffffc9000c46a000 RSI: 000000000000098b RDI: 000000000000098c RBP: 0000000000000002 R08: ffffffff8fa32437 R09: 1ffffffff1f46486 R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffffffff8f595c10 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000199 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10832 perf_try_init_event+0x17c/0x870 kernel/events/core.c:12561 perf_init_event kernel/events/core.c:12659 [inline] perf_event_alloc+0x133e/0x2be0 kernel/events/core.c:12934 __do_sys_perf_event_open kernel/events/core.c:13452 [inline] __se_sys_perf_event_open+0x5a1/0x1d70 kernel/events/core.c:13333 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc61218ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc612ff4038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fc6123b5fa0 RCX: 00007fc61218ebe9 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000200000000200 RBP: 00007fc612211e19 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc6123b6038 R14: 00007fc6123b5fa0 R15: 00007fff60c82988 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 18049 Comm: kworker/u8:18 Not tainted 6.16.0-syzkaller-g1b30d4441727 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:217 Code: 08 60 9f 92 65 8b 15 28 c1 df 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 <83> fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c RSP: 0018:ffffc900047ff658 EFLAGS: 00000246 RAX: ffffffff81b4498b RBX: 1ffff110170e7f61 RCX: ffff888024838000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900047ff7e0 R08: ffffffff8fa32437 R09: 1ffffffff1f46486 R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffff8880b873fb08 R13: dffffc0000000000 R14: ffff8880b863b1c0 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125c2a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f78c87fff9c CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xd4b/0x12d0 kernel/smp.c:877 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2654 [inline] smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2864 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x128/0x250 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate+0xad/0x240 mm/kfence/core.c:850 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245